EP3486146B1 - Dispositif de renforcement et d'étanchéité d'un élément structurel - Google Patents

Dispositif de renforcement et d'étanchéité d'un élément structurel Download PDF

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Publication number
EP3486146B1
EP3486146B1 EP17201952.3A EP17201952A EP3486146B1 EP 3486146 B1 EP3486146 B1 EP 3486146B1 EP 17201952 A EP17201952 A EP 17201952A EP 3486146 B1 EP3486146 B1 EP 3486146B1
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EP
European Patent Office
Prior art keywords
adhesive
reinforcing element
longitudinal axis
structural element
reinforcing
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active
Application number
EP17201952.3A
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German (de)
English (en)
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EP3486146A1 (fr
Inventor
Vincent Belpaire
Ardi SHEHU
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Sika Technology AG
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Sika Technology AG
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Filing date
Publication date
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Application filed by Sika Technology AG filed Critical Sika Technology AG
Priority to EP17201952.3A priority Critical patent/EP3486146B1/fr
Priority to US16/192,372 priority patent/US10933922B2/en
Publication of EP3486146A1 publication Critical patent/EP3486146A1/fr
Application granted granted Critical
Publication of EP3486146B1 publication Critical patent/EP3486146B1/fr
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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
    • B62D—MOTOR VEHICLES; TRAILERS
    • B62D29/00—Superstructures, understructures, or sub-units thereof, characterised by the material thereof
    • B62D29/001—Superstructures, understructures, or sub-units thereof, characterised by the material thereof characterised by combining metal and synthetic material
    • B62D29/002—Superstructures, understructures, or sub-units thereof, characterised by the material thereof characterised by combining metal and synthetic material a foamable synthetic material or metal being added in situ
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
    • B62D—MOTOR VEHICLES; TRAILERS
    • B62D25/00—Superstructure or monocoque structure sub-units; Parts or details thereof not otherwise provided for
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
    • B62D—MOTOR VEHICLES; TRAILERS
    • B62D25/00—Superstructure or monocoque structure sub-units; Parts or details thereof not otherwise provided for
    • B62D25/04—Door pillars ; windshield pillars
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
    • B62D—MOTOR VEHICLES; TRAILERS
    • B62D29/00—Superstructures, understructures, or sub-units thereof, characterised by the material thereof
    • B62D29/001—Superstructures, understructures, or sub-units thereof, characterised by the material thereof characterised by combining metal and synthetic material
    • B62D29/005—Superstructures, understructures, or sub-units thereof, characterised by the material thereof characterised by combining metal and synthetic material preformed metal and synthetic material elements being joined together, e.g. by adhesives

Definitions

  • the present invention relates to a device for reinforcing and sealing a structural element, as well as a system of a reinforced and sealed structural element of a motor vehicle.
  • components such as bodies and / or frames of means of transport and locomotion, in particular from vehicles on water or on land or from aircraft, have structures with cavities in order to enable lightweight constructions.
  • cavities In many cases, components, such as bodies and / or frames of means of transport and locomotion, in particular from vehicles on water or on land or from aircraft, have structures with cavities in order to enable lightweight constructions.
  • these voids cause various problems. Depending on the type of cavity, it must be sealed to prevent the ingress of moisture and dirt, which can lead to corrosion of the components. It is often also desirable to significantly strengthen the cavities and thus the structural element, but to maintain the low weight. It is often also necessary to stabilize the cavities and thus the components in order to reduce noise that would otherwise be transmitted along or through the cavity. Many of these cavities are irregular in shape or narrow in size, making them difficult to properly seal, reinforce, and dampen.
  • sealing elements English: baffle
  • reinforcing elements English: reinforcer
  • a body of an automobile is shown schematically.
  • the body 10 has various structures with cavities, such as columns 14 and supports or struts 12.
  • Such structural elements 12, 14 with cavities are usually sealed or reinforced with sealing and / or reinforcing elements 16.
  • FIG. 1b a cross section through a structural element 12, 14 is shown schematically.
  • a first sheet 4 and a second sheet 5 are often joined together at joints 6, 7, the sheets 4, 5 forming a cavity 3 between the joints 6, 7.
  • a generic reinforcing element which comprises a carrier with a plurality of ribs.
  • a device for reinforcing and sealing a structural element in a motor vehicle comprising: a reinforcing element with a longitudinal axis, which can be arranged in a cavity of the structural element, the reinforcing element comprising walls which extend essentially in the direction of the longitudinal axis, wherein partial areas of the walls on an outer circumference of the reinforcement element form at least one band which runs around the reinforcement element and which runs transversely to the longitudinal axis of the reinforcement element.
  • the device proposed here offers the advantage that only one element can be used in structural elements with limited space in order to both seal and reinforce the structural element.
  • the band runs around the reinforcing element completely, so that a self-contained, continuous band is present.
  • the band runs essentially completely around the reinforcement element, so that a substantially continuous band is present.
  • the band does not completely run around the reinforcing element, the band being interrupted in the circumferential direction by a gap.
  • this gap in the circumferential direction is at most 10 mm or at most 8 mm or at most 6 mm or at most 4 mm or at most 2 mm.
  • the reinforcement element has an extension, measured in the direction of the longitudinal axis of the reinforcement element, of at least 50 mm.
  • the tape has an extension, measured in the direction of the longitudinal axis of the reinforcing element, of at least 3 mm or at least 5 mm or at least 7 mm or at least 9 mm or at least 11 mm or at least 13 mm and / or at most 30 mm or at most 25 mm or at most 20 mm or at most 15 mm.
  • a plane arranged orthogonally to the longitudinal axis of the reinforcement element can be placed in such a way that a line of intersection of this plane with the outer circumference of the reinforcement element lies completely in the band.
  • the reinforcement element has, in addition to the tape, surfaces for gluing to the structural element.
  • the reinforcing element has surfaces in the direction of the longitudinal axis in front of and behind the tape for bonding to the structural element.
  • a first adhesive is arranged at least on subregions of the walls next to the tape, a second adhesive being arranged at least on subregions of the tape.
  • the reinforcement element comprises ribs which interconnect the walls.
  • the reinforcement element contains metal, steel, aluminum, magnesium, plastic, fiber-reinforced plastic, organo sheet, or a combination of these materials.
  • the walls are formed from the same material.
  • the reinforcement element described here can be produced, for example, by a three-dimensional printing process.
  • the object set at the beginning is also achieved by a system of a reinforced and sealed structural element in a motor vehicle, the system comprising: a structural element; a reinforcement element as described above, wherein the reinforcement element is arranged in the structural element; and a first adhesive, the first adhesive bonding the reinforcing element and the structural element together; and a second adhesive, the second adhesive bonding the tape to the structural member.
  • the first adhesive has an expansion rate of less than 500%, or less than 400%, or less than 300%, or the adhesive is a non-expandable adhesive.
  • non-expandable or little expandable adhesives examples include SikaReinforcer®-940 or SikaPower®-497.
  • SikaReinforcer®-940 is an example of an expandable material
  • SikaPower®-497 is an example of a non-expandable material.
  • non-expandable means that a material does not change its volume by more or less than 10% in the process steps provided for the material.
  • non-expandable adhesives can shrink slightly when they cure. Such a change in volume during curing is regarded as “non-expandable” in the context of this application.
  • the second adhesive is an expandable adhesive.
  • the second adhesive has an expansion rate of more than 800%, preferably of more than 1000%, particularly preferably of more than 1500%.
  • the first adhesive and / or the second adhesive can be hardened by a temperature of more than 120 ° or more than 140 ° or more than 160 °.
  • the first adhesive has a modulus of elasticity of at least 100 MPa or of at least 150 MPa or of at least 200 MPa
  • the second adhesive has a modulus of elasticity of at most 20 MPa or at most 15 MPa or at most 10 MPa.
  • the system comprises a third adhesive, the adhesives having different properties, in particular with regard to expansion and / or curing and / or connectivity and / or mechanical load-bearing capacity.
  • a first embodiment of a reinforcing element 20 is shown schematically.
  • the reinforcement element 20 has a longitudinal axis 26 and side walls 21, 22, 23, 25 which extend along this longitudinal axis 26.
  • the Reinforcing element 20 in this exemplary embodiment also has a front wall 24 and a rear wall 24.
  • Partial areas of the side walls 21, 22, 23, 25 form a band 28 which runs around the reinforcing element 20 and which runs transversely to the longitudinal axis 26.
  • the side walls 21, 22, 23, 25 have further subregions for connecting the reinforcement element 20 to the structural element. These further subregions are arranged both in front of and behind the belt 28, in the direction of the longitudinal axis 26.
  • a more expandable adhesive can be placed on the tape 28 to completely seal the cross-section of the structural element.
  • a less expandable or non-expandable adhesive can be arranged on the connecting surfaces next to the tape 28 in order to glue the reinforcing element 20 to the structural element and to mechanically reinforce the latter.
  • a further exemplary embodiment of a reinforcement element 20 is shown schematically.
  • this reinforcing element 20 has side walls 21, 22 each subdivided into partial walls 21.1, 21.2, 22.1, 22.2, a first band 28.1 and a second band 28.2, and ribs 17 in the interior of the reinforcing element 20.
  • this reinforcing element 20 has no front wall 24 and none Back wall 24.
  • a further exemplary embodiment of a reinforcement element 20 is shown schematically.
  • this reinforcing element 20 has no closed side walls 21, 22, 23, 25, but a W-shaped or M-shaped cross section, so that the third Side wall 23 and the fourth side wall 25 do not completely cover the respective sides.
  • the band 28 is again formed by the side walls 21, 22, 23, 25, which are each formed continuously at the location of the band 28.

Claims (13)

  1. Système (1) d'un élément structural renforcé et étanchéifié (12, 14) dans un véhicule automobile, le système comprenant :
    - un élément structural (12, 14) ;
    - un élément de renforcement (20) ayant un axe longitudinal (26), qui est agencé dans une cavité (3) de l'élément structural (12, 14), l'élément de renforcement (20) comprenant des parois (21, 22, 23, 25), qui s'étendent essentiellement dans la direction de l'axe longitudinal (26), et des zones partielles des parois (21, 22, 23, 25) formant sur une circonférence extérieure de l'élément de renforcement (20) au moins une bande (28), qui fait le tour de l'élément de renforcement (20), et qui s'étend perpendiculairement à l'axe longitudinal (26) de l'élément de renforcement (20) ;
    - un premier adhésif, le premier adhésif reliant l'élément de renforcement (20) et l'élément structural (12, 14) l'un avec l'autre ;
    caractérisé en ce que le système comprend un deuxième adhésif, le deuxième adhésif reliant la bande (28) avec l'élément structural (12, 14).
  2. Système (1) selon la revendication 1, dans lequel l'élément de renforcement (20) a une étendue, mesurée dans la direction de l'axe longitudinal (26) de l'élément de renforcement (20), d'au moins 50 mm.
  3. Système (1) selon la revendication 1 ou 2, dans lequel la bande (28) a une étendue, mesurée dans la direction de l'axe longitudinal (26) de l'élément de renforcement (20), d'au moins 3 mm et/ou d'au plus 30 mm.
  4. Système (1) selon l'une quelconque des revendications précédentes, dans lequel un plan agencé orthogonalement à l'axe longitudinal (26) de l'élément de renforcement (20) peut être disposé de telle sorte qu'une ligne de coupe de ce plan avec la circonférence extérieure de l'élément de renforcement (20) se trouve entièrement dans la bande (28).
  5. Système (1) selon l'une quelconque des revendications précédentes, dans lequel l'élément de renforcement (20) comprend en plus de la bande (28) des surfaces pour le collage avec l'élément structural (12, 14), et/ou dans lequel l'élément de renforcement (20) comprend, dans la direction de l'axe longitudinal (26) respectivement avant et après la bande (28), des surfaces pour le collage avec l'élément structural (12, 14) .
  6. Système (1) selon l'une quelconque des revendications précédentes, dans lequel le deuxième adhésif (13.2) comprend un matériau expansible ayant un taux d'expansion de plus de 500 %.
  7. Système (1) selon l'une quelconque des revendications précédentes, dans lequel l'élément de renforcement (20) comprend des nervures (17), qui relient les parois (21, 22, 23, 25) les unes avec les autres.
  8. Système (1) selon l'une quelconque des revendications précédentes, dans lequel les parois (21, 22, 23, 25) sont formées du même matériau.
  9. Système (1) selon l'une quelconque des revendications précédentes, dans lequel l'élément de renforcement (20) contient du métal, de l'acier, de l'aluminium, du magnésium, du plastique, du plastique renforcé par des fibres, de la tôle organique, ou une combinaison de ces matériaux.
  10. Système (1) selon l'une quelconque des revendications précédentes, dans lequel le premier adhésif est un adhésif non expansible ou un adhésif expansible.
  11. Système (1) selon l'une quelconque des revendications précédentes, dans lequel le deuxième adhésif est un adhésif expansible.
  12. Système (1) selon l'une quelconque des revendications précédentes, dans lequel le premier adhésif a un taux d'expansion de moins de 500 % et dans lequel le deuxième adhésif a un taux d'expansion de plus de 800 %.
  13. Système (1) selon l'une quelconque des revendications précédentes, dans lequel, après un durcissement des adhésifs, le premier adhésif a un module E d'au moins 100 MPa, et le deuxième adhésif a un module E d'au plus 20 MPa.
EP17201952.3A 2017-11-15 2017-11-15 Dispositif de renforcement et d'étanchéité d'un élément structurel Active EP3486146B1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
EP17201952.3A EP3486146B1 (fr) 2017-11-15 2017-11-15 Dispositif de renforcement et d'étanchéité d'un élément structurel
US16/192,372 US10933922B2 (en) 2017-11-15 2018-11-15 Device for reinforcing and sealing a structural element

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP17201952.3A EP3486146B1 (fr) 2017-11-15 2017-11-15 Dispositif de renforcement et d'étanchéité d'un élément structurel

Publications (2)

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EP3486146A1 EP3486146A1 (fr) 2019-05-22
EP3486146B1 true EP3486146B1 (fr) 2021-04-14

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EP3642098B1 (fr) * 2017-06-22 2022-11-16 Sika Technology AG Élément de renfort, système d'un élément structural renforcé et procédé de renforcement d'un élément structural
WO2019096694A1 (fr) * 2017-11-15 2019-05-23 Sika Technology Ag Dispositif pour renforcer un élément structural
US10829159B2 (en) * 2018-09-18 2020-11-10 Fca Us Llc Vehicle having reinforcement assemblies
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US10933922B2 (en) 2021-03-02

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